package com.springBoot.springBootSysCore.modules.controller.web.base;

import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.springBoot.springBootSysCore.common.beanvalidator.BeanValidators;
import com.springBoot.springBootSysCore.common.mapper.JsonMapper;
import com.springBoot.springBootSysCore.common.utils.DateUtils;
import org.apache.commons.lang3.StringEscapeUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.ui.Model;
import org.springframework.web.bind.WebDataBinder;
import org.springframework.web.bind.annotation.InitBinder;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import javax.servlet.http.HttpServletResponse;
import javax.validation.ConstraintViolationException;
import javax.validation.Validator;
import java.beans.PropertyEditorSupport;
import java.io.IOException;
import java.util.Date;
import java.util.List;

/**
 * Created by timo on 2017/11/27.
 */
public class SimpleBaseController {
    /**
     * 日志对象
     */
    protected Logger logger = LoggerFactory.getLogger(getClass());

    /**
     * 管理基础路径
     */
    @Value("${adminPath}")
    protected String adminPath;

    /**
     * 前端基础路径
     */
    @Value("${frontPath}")
    protected String frontPath;

    /**
     * 前端URL后缀
     */
    @Value("${urlSuffix}")
    protected String urlSuffix;

    /**
     * 验证Bean实例对象
     */
    @Autowired
    protected Validator validator;

    /**
     * 服务端参数有效性验证
     * @param object 验证的实体对象
     * @param groups 验证组
     * @return 验证成功：返回true；严重失败：将错误信息添加到 message 中
     */
    protected boolean beanValidator(Model model, Object object, Class<?>... groups) {
        try{
            BeanValidators.validateWithException(validator, object, groups);
        }catch(ConstraintViolationException ex){
            List<String> list = BeanValidators.extractPropertyAndMessageAsList(ex, ": ");
            list.add(0, "数据验证失败：");
            addMessage(model, list.toArray(new String[]{}));
            return false;
        }
        return true;
    }

    /**
     * 服务端参数有效性验证
     * @param object 验证的实体对象
     * @param groups 验证组
     * @return 验证成功：返回true；严重失败：将错误信息添加到 flash message 中
     */
    protected boolean beanValidator(RedirectAttributes redirectAttributes, Object object, Class<?>... groups) {
        try{
            BeanValidators.validateWithException(validator, object, groups);
        }catch(ConstraintViolationException ex){
            List<String> list = BeanValidators.extractPropertyAndMessageAsList(ex, ": ");
            list.add(0, "数据验证失败：");
            addMessage(redirectAttributes, list.toArray(new String[]{}));
            return false;
        }
        return true;
    }

    /**
     * 服务端参数有效性验证
     * @param object 验证的实体对象
     * @param groups 验证组，不传入此参数时，同@Valid注解验证
     * @return 验证成功：继续执行；验证失败：抛出异常跳转400页面。
     */
    protected void beanValidator(Object object, Class<?>... groups) {
        BeanValidators.validateWithException(validator, object, groups);
    }

    /**
     * 添加Model消息
     */
    protected void addMessage(Model model, String... messages) {
        StringBuilder sb = new StringBuilder();
        for (String message : messages){
            sb.append(message).append(messages.length>1?"<br/>":"");
        }
        model.addAttribute("message", sb.toString());
    }

    /**
     * 添加Flash消息
     */
    protected void addMessage(RedirectAttributes redirectAttributes, String... messages) {
        StringBuilder sb = new StringBuilder();
        for (String message : messages){
            sb.append(message).append(messages.length>1?"<br/>":"");
        }
        redirectAttributes.addFlashAttribute("message", sb.toString());
    }

    /**
     * 客户端返回JSON字符串
     * @param response
     * @param object
     * @return
     */
    protected String renderString(HttpServletResponse response, Object object) {
        return renderString(response, JsonMapper.toJsonString(object), "application/json");
    }
    /**
     * 将对象转化为json输出
     * @param obj
     * @return
     * @throws JsonProcessingException
     */
    protected String writeValueAsString(Object obj) throws JsonProcessingException {
        ObjectMapper om = new ObjectMapper();
        return om.writeValueAsString(obj);
    }
    /**
     * 客户端返回字符串
     * @param response
     * @param string
     * @return
     */
    protected String renderString(HttpServletResponse response, String string, String type) {
        try {
            response.reset();
            response.setContentType(type);
            response.setCharacterEncoding("utf-8");
            response.getWriter().print(string);
            return null;
        } catch (IOException e) {
            return null;
        }
    }

    /**
     * 初始化数据绑定
     * 1. 将所有传递进来的String进行HTML编码，防止XSS攻击
     * 2. 将字段中Date类型转换为String类型
     */
    @InitBinder
    protected void initBinder(WebDataBinder binder) {
        // String类型转换，将所有传递进来的String进行HTML编码，防止XSS攻击
        binder.registerCustomEditor(String.class, new PropertyEditorSupport() {
            @Override
            public void setAsText(String text) {
                setValue(text == null ? null : StringEscapeUtils.escapeHtml4(text.trim()));
            }
            @Override
            public String getAsText() {
                Object value = getValue();
                return value != null ? value.toString() : "";
            }
        });
        // Date 类型转换
        binder.registerCustomEditor(Date.class, new PropertyEditorSupport() {
            @Override
            public void setAsText(String text) {
                setValue(DateUtils.parseDate(text));
            }
//			@Override
//			public String getAsText() {
//				Object value = getValue();
//				return value != null ? DateUtils.formatDateTime((Date)value) : "";
//			}
        });
//        binder.registerCustomEditor(Date.class, new CustomDateEditor(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"), true));
//        binder.registerCustomEditor(Date.class, new CustomDateEditor(new SimpleDateFormat("yyyy-MM-dd"), true));
//        binder.registerCustomEditor(int.class, new CustomNumberEditor(int.class, true));
//        binder.registerCustomEditor(long.class, new CustomNumberEditor(long.class, true));
//        binder.registerCustomEditor(double.class, new  CustomNumberEditor(double.class, true));
//        binder.registerCustomEditor(float.class, new CustomNumberEditor(float.class, true));


    }
}
